WO2022075261A1 - Compresseur électrique - Google Patents

Compresseur électrique Download PDF

Info

Publication number
WO2022075261A1
WO2022075261A1 PCT/JP2021/036626 JP2021036626W WO2022075261A1 WO 2022075261 A1 WO2022075261 A1 WO 2022075261A1 JP 2021036626 W JP2021036626 W JP 2021036626W WO 2022075261 A1 WO2022075261 A1 WO 2022075261A1
Authority
WO
WIPO (PCT)
Prior art keywords
axis
housing
stator
flow path
electric compressor
Prior art date
Application number
PCT/JP2021/036626
Other languages
English (en)
Japanese (ja)
Inventor
孝幸 桑原
弘文 平田
圭史 三俣
幹人 佐々木
Original Assignee
三菱重工サーマルシステムズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱重工サーマルシステムズ株式会社 filed Critical 三菱重工サーマルシステムズ株式会社
Publication of WO2022075261A1 publication Critical patent/WO2022075261A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Definitions

  • This disclosure relates to an electric compressor.
  • Patent Document 1 discloses a structure in which an insertion hole for inserting a fastening bolt is formed in a stator, the tip of a fastening bolt inserted in the insertion hole is fastened to a fastening hole formed in a housing, and the stator is fixed to the housing.
  • Patent Document 2 discloses that a refrigerant is circulated between the housing and the stator to suppress the temperature rise of the stator.
  • the length of the insertion hole formed in the stator for fixing the stator to the housing is the same as the total length (motor product thickness) of the stator in the drive axis direction of the motor. I have to. Therefore, if the total length of the stator is increased in order to improve the output of the motor, the total length of the insertion hole and the fastening bolt inserted into the insertion hole is increased accordingly.
  • a refrigerant is circulated between the housing and the outer peripheral surface of the stator to suppress the temperature rise of the stator.
  • the stator since the region where the refrigerant flows and the coil wound around the stator are separated from each other, the stator may not be sufficiently cooled by the refrigerant and the motor efficiency may decrease.
  • an object of the present invention is to provide an electric compressor capable of suppressing the generation of vibration and the loosening or breakage of the fastening bolt that fastens the stator to the housing. And. Another object of the present invention is to provide an electric compressor capable of sufficiently cooling the stator with a refrigerant to improve motor efficiency.
  • the electric compressor includes a housing formed in a tubular shape extending along an axis, a compressor arranged inside the housing and rotating around the axis to compress a fluid.
  • a motor for rotationally driving the compressor around the axis and a plurality of fastening bolts for fixing the motor to the inside of the housing are provided, and the motor is arranged inside the housing and along the axis.
  • a stator having a first length and a rotor arranged on the inner peripheral side of the stator are provided, and the stator is arranged along the circumferential direction around the axis and the first along the axis.
  • a fastening hole for fastening the fastening bolt is formed in the housing or another member fixed to the housing, which has a plurality of positioning portions having a second length shorter than one length.
  • the stator is fixed to the inside of the housing by fastening the fastening bolt inserted into the insertion hole formed in the positioning portion to the fastening hole.
  • the electric compressor includes a housing formed in a tubular shape extending along an axis, a compressor arranged inside the housing and rotating around the axis to compress the refrigerant.
  • the compressor includes a motor that rotationally drives the compressor around the axis, and the motor includes a stator that is arranged inside the housing and a rotor that is arranged on the inner peripheral side of the stator.
  • a refrigerant flow path is formed in which a refrigerant flows from an inlet provided on one end side along the axis toward an outlet provided on the other end side along the axis.
  • the path is formed along the axis on the one end side, and the radial distance from the axis gradually shortens from the one end side to the other end side, and the path is along the axis.
  • a second flow path portion that is formed on the other end side and communicates with the first flow path portion, and the radial distance from the axis line gradually shortens from the other end side toward the one end side.
  • an electric compressor capable of suppressing the generation of vibration and the loosening or breakage of the fastening bolt that fastens the stator to the housing. Further, according to the present disclosure, it is possible to provide an electric compressor capable of sufficiently cooling the stator with a refrigerant to improve the motor efficiency.
  • FIG. 3 is a cross-sectional view taken along the line AA of the electric compressor shown in FIG.
  • FIG. 3 is a cross-sectional view taken along the line BB of the electric compressor shown in FIG.
  • It is a partial vertical sectional view which shows the electric compressor of the comparative example.
  • It is a partial vertical sectional view which shows the electric compressor of the modification of 1st Embodiment.
  • It is a partial vertical sectional view which shows the electric compressor which concerns on 2nd Embodiment of this disclosure.
  • FIG. 6 is a cross-sectional view taken along the line EE of the electric compressor shown in FIG.
  • FIG. 12 is a cross-sectional view taken along the line JJ of the stator shown in FIG.
  • FIG. 13 is a cross-sectional view taken along the line KK of the stator shown in FIG.
  • FIG. 15 is a cross-sectional view taken along the line MM of the stator shown in FIG. 16 is a cross-sectional view taken along the line NN of the stator shown in FIG. It is a partial cross-sectional view which shows the electric compressor which concerns on the 3rd modification of 4th Embodiment.
  • FIG. 1 is a partial vertical sectional view showing an electric compressor according to the present embodiment.
  • FIG. 2 is a cross-sectional view taken along the line AA of the electric compressor 100 shown in FIG.
  • FIG. 3 is a cross-sectional view taken along the line BB of the electric compressor 100 shown in FIG.
  • the cross-sectional view shown in FIG. 1 is a cross-sectional view taken along the line CC of FIG.
  • the cross-sectional view shown in FIG. 1 is a cross-sectional view taken along the line DD of FIG.
  • the electric compressor 100 of the present embodiment is a device that compresses the refrigerant (fluid) sucked from the suction port P1 and discharges it to the outside from the discharge port P2.
  • the electric compressor 100 of the present embodiment includes a housing 10, an end housing (sealing member) 20, a compressor 30, a motor 40, a fastening bolt 50, and a first bearing 60.
  • a second bearing 70, a holding portion 80, and an inverter 90 are provided.
  • the housing 10 is a member formed in a substantially cylindrical shape extending along the axis X, and houses the compressor 30 and the motor 40 inside.
  • the housing 10 is made of a metal material such as an aluminum alloy.
  • the housing 10 has an opening 11 sealed by the end housing 20 at the end on the end housing 20 side in the X direction of the axis.
  • a suction port P1 is provided on the outer peripheral surface in the vicinity of the bottom portion 12 of the housing 10.
  • the refrigerant supplied from the outside is introduced into the inside of the housing 10 from the suction port P1.
  • the refrigerant introduced into the housing 10 flows from the bottom 12 toward the opening 11 along the axis X.
  • the end housing 20 is a member that seals the opening 11 of the housing 10 with the compressor 30 and the motor 40 inserted from the opening 11 into the housing 10.
  • the end housing 20 is fixed to the housing 10 by fastening the fastening bolt 21 to a fastening hole (not shown) formed in the opening 11 of the housing 10.
  • the opening 11 arranged at the end of the housing 10 on the compressor 30 side along the axis X is sealed by the end housing 20.
  • the compressor 30 is a device that is arranged inside the housing 10 and rotates around the axis X to compress the fluid.
  • the compressor 30 includes, for example, a scroll compression mechanism that compresses the refrigerant by revolving a swivel scroll (not shown) combined with a fixed scroll (not shown) fixed to the housing 10 around the axis X. ..
  • the compressor 30 sucks the refrigerant introduced into the inside of the housing 10 from the suction port P1 and compresses it, and guides the compressed refrigerant to the discharge port P2 provided in the end housing 20.
  • the refrigerant guided to the discharge port P2 is supplied to the outside through a pipe (not shown) connected to the discharge port P2.
  • the motor 40 is a device that rotationally drives the compressor 30 around the axis X.
  • the motor 40 includes a stator 41, a rotor 42, a drive shaft 43, a bobbin 44, and a bobbin 45.
  • the stator 41 is configured by laminating a predetermined number of electrical steel sheets punched and formed in an annular shape. As shown in FIGS. 2 and 3, a plurality of tooth portions 41a are provided on the inner peripheral side of the stator 41. A coil winding (not shown) is wound around each of the plurality of tooth portions 41a on the stator 41 via the bobbin 44 and the bobbin 45.
  • the stator 41 is arranged inside the housing 10 and has a length L1 along the axis X from the position X1 of the end portion on the bottom 12 side to the position X2 of the end portion on the compressor 30 side. Has (first length).
  • the stator 41 has a plurality of positioning portions 41b having a length L2 (second length) shorter than the length L1 along the axis X.
  • the positioning portion 41b is a portion having an insertion hole 41b1 into which the fastening bolt 50 is inserted.
  • the positioning portions 41b are arranged at a plurality of locations along the circumferential direction CD around the axis X.
  • a plurality of groove portions 41c extending along the axis X are formed at each position of the circumferential CD in which the plurality of positioning portions 41b are arranged. ..
  • a plurality of protrusions 15 that are accommodated in the plurality of groove portions 41c and extend along the axis X are formed at each position of the circumferential direction CD in which the plurality of groove portions 41c are arranged. ..
  • a space through which the refrigerant flows is provided between the inner peripheral surface of the housing 10 and the outer peripheral surface of the stator 41.
  • the heat of the stator 41 can be transferred to the refrigerant through the outer peripheral surface of the stator 41 to cool the stator 41.
  • an uneven shape may be provided on the outer peripheral surface of the stator 41 forming the groove portion 41c. By providing the uneven shape, the contact area where the stator 41 comes into contact with the refrigerant can be increased, and the cooling efficiency of the stator 41 by the refrigerant can be improved.
  • a fastening hole 51 for fastening the fastening bolt 50 is formed on the end surface of the protruding portion 15 of the housing 10 on the compressor 30 side.
  • the end face of the protrusion 15 of the housing 10 on the compressor 30 side is an end face facing the end face of the positioning portion 41b on the bottom 12 side.
  • the fastening hole 51 is formed on the end surface of the protruding portion 15 facing the positioning portion 41b.
  • the stator 41 is fixed inside the housing 10 by fastening the fastening bolt 50 inserted into the insertion hole 41b1 formed in the positioning portion 41b to the fastening hole 51.
  • the plurality of fastening bolts 50 fix the stator 41 of the motor 40 to the inside of the housing 10 at a plurality of locations on the circumferential CD.
  • the rotor 42 is arranged with a predetermined gap on the inner peripheral side of the stator 41.
  • the rotor 42 is configured by laminating a predetermined number of electrical steel sheets punched and formed in an annular shape.
  • the drive shaft 43 is a member that is inserted into a through hole formed in the center of the rotor 42, connected to the rotor 42, and arranged on the axis X.
  • the drive shaft 43 is integrated with the rotor 42 and rotates around the axis X, and transmits the driving force rotating around the axis X to the compressor 30.
  • the end of the drive shaft 43 on the opening 11 side is rotatably supported around the axis X by the first bearing 60.
  • the end of the drive shaft 43 on the bottom 12 side is rotatably supported around the axis X by the second bearing 70.
  • the holding portion 80 is a member that is fixed to the housing 10 and holds the first bearing 60.
  • the end surface on the bottom 12 side contacts the step portion 13 of the housing 10, and the end surface on the opening 11 side contacts the compressor 30.
  • the holding portion 80 is fixed in the position in the axis X direction while being sandwiched between the housing 10 and the compressor 30.
  • the inverter 90 is a device that converts DC power supplied from an external power source into AC power and applies AC power to the motor 40 to rotate and drive the motor 40.
  • the inverter 90 is arranged in a space isolated from the closed space formed inside the housing 10.
  • FIG. 4 is a partial vertical sectional view showing the electric compressor 100A of the comparative example.
  • the length of the insertion hole 41b1 formed in the stator 41 for fixing the stator 41 to the housing 10 is the same as the total length of the stator 41 in the direction along the axis X of the motor 40.
  • the length is L1.
  • the position of the center of gravity of the motor 40 in the axis X direction is the position Xg.
  • the contact position where the housing 10 and the positioning portion 41b of the stator 41 come into contact with each other coincides with the position Xg on the axis X.
  • the contact position where the housing 10 and the stator 41 come into contact is the position X1 where the end portion on the bottom 12 side of the stator 41 is arranged.
  • the electric compressor 100A of the comparative example is separated by a length L3 from the position X1 which is the contact position where the housing 10 and the stator 41 come into contact to the position Xg which is the position of the center of gravity.
  • the contact position where the housing 10 and the stator 41 come into contact coincides with the position Xg where the center of gravity is located. That is, the electric compressor 100 of the present embodiment has a shorter distance from the contact position where the housing 10 and the stator 41 come into contact with the center of gravity position than the electric compressor 100A of the comparative example.
  • the vibration caused by the operation of the electric compressor 100 is compared with the case where the position where the stator 41 is positioned on the housing 10 is the position of the end face along the axis X of the stator 41. And the moment acting on the motor 40 becomes smaller due to the external force acting on the electric compressor 100. Therefore, it is possible to provide the electric compressor 100 capable of suppressing the generation of vibration and the loosening and breakage of the fastening bolt that fastens the stator 41 to the housing 10.
  • the contact position where the housing 10 and the stator 41 contact is the same as the position Xg which is the position of the center of gravity, but other embodiments may be used.
  • the contact position where the housing 10 and the stator 41 come into contact does not have to coincide with the position Xg as long as it is closer to the position of the center of gravity of the motor 40 than the position of the end surface along the axis X of the stator 41.
  • FIG. 5 is a partial cross-sectional view showing an electric compressor 100B of a modified example of the present embodiment.
  • the contact position where the housing 10 and the stator 41 come into contact is closer to the position Xg, which is the center of gravity of the motor 40, than the position X2 of the end face along the axis X of the stator 41. It is X3.
  • the stator 41 is arranged inside the housing 10 and has a length L1 along the axis X from the position X1 of the end portion on the bottom 12 side to the position X2 of the end portion on the compressor 30 side.
  • the stator 41 has a plurality of positioning portions 41b having a length L2 shorter than the length L1 along the axis X.
  • the positioning portion 41b is provided at the end of the stator 41 close to the compressor 30 in the direction along the axis X.
  • the contact position where the housing 10 and the stator 41 come into contact with each other is separated from the position Xg, which is the position of the center of gravity, by the length L4.
  • the length L4 is shorter than the length L3.
  • the positions of the fastening holes 51 formed in the housing 10 of the electric compressor 100 will be described.
  • the length from the opening 11 of the housing 10 to the contact position where the stator 41 and the housing 10 come into contact is the length L5.
  • the length from the opening 11 of the housing 10 to the contact position where the stator 41 and the housing 10 come into contact is a length L6 longer than the length L5. It has become.
  • the electric compressor 100 of the present embodiment has a shorter length from the opening 11 to the contact position where the stator 41 and the housing 10 come into contact with each other than the electric compressor 100A of the comparative example. Therefore, the workability when inserting a tool through the opening 11 of the housing 10 to form the fastening hole 51 in the housing 10 is improved.
  • the length from the opening 11 of the housing 10 to the contact position where the stator 41 and the housing 10 come into contact is a length L7 shorter than the length L5.
  • the electric compressor 100B of the modified example has a shorter length from the opening 11 to the contact position where the stator 41 and the housing 10 come into contact with each other than the electric compressor 100 of the present embodiment. Therefore, the workability when inserting a tool through the opening 11 of the housing 10 to form the fastening hole 51 in the housing 10 is further improved.
  • the electric compressor 100 of the present embodiment described above exhibits the following actions and effects.
  • the fastening bolt 50 is inserted into the insertion holes 41b1 formed in the plurality of positioning portions 41b of the stator 41 and fastened to the fastening holes 51 formed in the housing 10. ..
  • the length L2 of the positioning portion 41b of the stator 41 along the axis X is shorter than the length L1 which is the total length of the stator 41. Therefore, the contact position where the housing 10 and the positioning portion 41b come into contact is a position closer to the position of the center of gravity of the motor than the position of the end surface along the axis X of the stator 41.
  • the motor is caused by vibration caused by the operation of the electric compressor and external force acting on the electric compressor.
  • the moment acting on the motor becomes smaller. Therefore, it is possible to provide an electric compressor capable of suppressing the generation of vibration and the loosening and breakage of the fastening bolt that fastens the stator to the housing.
  • the plurality of groove portions 41c formed on the outer peripheral surface of the stator 41 accommodate the plurality of projecting portions 15 protruding from the inner peripheral surface of the housing 10, and the stator 41 is positioned.
  • the fastening bolt 50 inserted into the portion 41b is fastened to the fastening hole 51 formed in the end surface of the protruding portion 15. Since the positioning portion 41b does not protrude from the outer peripheral surface of the stator 41, it is possible to suppress the generation of vibration and the loosening and breakage of the fastening bolt 50 without increasing the outer diameter of the electric compressor 100. Further, since the protruding portion 15 of the housing 10 is housed in the groove portion 41c of the stator 41, it is possible to appropriately restrict the rotation of the motor 40 in the circumferential direction CD with respect to the housing 10.
  • the positioning portion 41b is provided at the end of the stator 41 close to the compressor 30 in the direction along the axis X. Therefore, the distance along the axis X from the opening 11 of the housing to the position where the fastening hole 51 is formed is shortened as compared with the case where the stator 41 is positioned on the housing at the end of the stator 41 separated from the compressor 30. Can be done. Therefore, the workability when inserting a tool through the opening 11 of the housing 10 to form the fastening hole 51 in the housing 10 is improved.
  • the end face of the positioning portion 41b is fixed to the housing 10 in the vicinity of the position of the center of gravity of the motor 40. Therefore, it is possible to reduce the moment acting on the motor 40 due to the vibration caused by the operation of the electric compressor 100 or the external force acting on the electric compressor 100.
  • FIG. 6 is a partial vertical sectional view showing the electric compressor 100C according to the present embodiment.
  • FIG. 7 is a cross-sectional view taken along the line EE of the electric compressor 100C shown in FIG.
  • This embodiment is a modification of the first embodiment, and is the same as the first embodiment except for the cases described below, and the description thereof will be omitted below.
  • the protruding portion 15 of the housing 10 is housed in the groove portion 41c formed on the outer peripheral surface of the stator 41, and the fastening hole 51 is formed on the end surface of the protruding portion 15. rice field.
  • the fastening hole 51 is formed in the stepped portion 14 of the housing 10 facing the positioning portion 41b protruding from the outer peripheral surface of the stator 41.
  • the stator 41 is arranged inside the housing 10 and has a length L1 along the axis X from the position X1 of the end portion on the bottom 12 side to the position X2 of the end portion on the compressor 30 side.
  • the stator 41 has a plurality of positioning portions 41b having a length L2 shorter than the length L1 along the axis X.
  • the positioning portion 41b is provided at the end of the stator 41 close to the compressor 30 in the direction along the axis X.
  • the contact position where the housing 10 and the stator 41 come into contact with each other is separated from the position Xg, which is the position of the center of gravity, by the length L4.
  • the length L4 is shorter than the length L3.
  • the positioning portion 41b protrudes from the outer peripheral surface of the stator 41.
  • a first region R1 having a first inner diameter ID1 larger than the outer diameter of the positioning portion 41b and a second region R2 having a second inner diameter ID2 smaller than the outer diameter of the positioning portion 41b are provided on the inner peripheral surface of the housing 10.
  • a step portion 14 to be connected is formed on the inner peripheral surface of the housing 10.
  • the positioning portion 41b protrudes from the outer peripheral surface of the stator 41, and the fastening bolt 50 inserted into the positioning portion 41b of the stator 41 is formed on the end surface of the step portion 14 of the housing 10. It is fastened to the fastening hole 51 to be fastened. Since the positioning portion 41b has a shape protruding from the outer peripheral surface of the stator 41, it is possible to suppress the generation of vibration and the loosening or breakage of the fastening bolt 50 for fastening the stator 41 to the housing 10 without weakening the magnetic force of the stator 41. can.
  • FIG. 8 is a partial vertical sectional view showing the electric compressor 100D according to the present embodiment.
  • This embodiment is a modification of the first embodiment, and is the same as the first embodiment except for the cases described below, and the description thereof will be omitted below.
  • the electric compressors 100 and 100B of the first embodiment and the electric compressor 100C of the second embodiment form a fastening hole 51 in the housing 10.
  • the fastening hole 51 is formed in a member different from the housing 10.
  • the fastening hole 51 is formed in a holding portion 80 which is another member different from the housing 10.
  • the fastening hole 51 is formed on the end surface of the holding portion 80 facing the positioning portion 41b.
  • the first bearing 60 that supports the drive shaft 43 connected to the rotor 42 is held by the holding portion 80, and a fastening hole is provided on the end surface of the holding portion 80 facing the positioning portion 41b. 51 is formed.
  • a fastening hole 51 can be formed in advance in the holding portion 80 before being fixed to the housing 10. Therefore, the workability when forming the fastening hole 51 is improved as compared with the case where the tool is inserted into the housing 10 to form the fastening hole 51.
  • FIG. 9 is a partial cross-sectional view showing the electric compressor 100E according to the present embodiment.
  • FIG. 10 is a cross-sectional view taken along the line GG of the stator 41 shown in FIG.
  • FIG. 11 is a cross-sectional view taken along the line OH of the stator 41 shown in FIG.
  • FIG. 9 is a cross-sectional view taken along the line II of FIG.
  • This embodiment is a modification of the first embodiment, and is the same as the first embodiment except for the cases described below, and the description thereof will be omitted below.
  • a refrigerant flow path 46 for circulating the refrigerant is formed inside the stator 41 of the electric compressor 100E of the present embodiment.
  • the refrigerant flow path 46 is provided from an inflow port 46d provided on one end side (bottom 12 side of the housing 10) along the axis X to an outflow port provided on the other end side (opening 11 side of the housing 10) along the axis X. It is a flow path for flowing a refrigerant toward 46e.
  • the inflow port 46d is provided in the vicinity of the outer peripheral surface of the stator 41, which is closer to the housing 10 than the rotor 42 in the radial RD.
  • the flow rate of the refrigerant flowing into the housing 10 is larger on the outer peripheral side close to the housing 10 than on the inner peripheral side in the radial direction.
  • the refrigerant flow path 46 includes an inflow flow path portion (first flow path portion) 46a, an outflow flow path portion (second flow path portion) 46b, and a communication flow path portion 46c.
  • the inflow flow path portion 46a is a flow path formed on the inflow port 46d side along the axis X and gradually shortening the distance of the radial RD from the axis X from the inflow port 46d toward the outflow port 46e.
  • the outflow flow path portion 46b is a flow path formed on the outflow port 46e side along the axis X and gradually shortening the distance of the radial RD from the axis X from the outflow port 46e to the inflow port 46d.
  • the communication flow path portion 46c is a flow path that communicates the inflow flow path portion 46a and the outflow flow path portion 46b, and the flow in the radial direction RD from the axis line X is constant at each position along the axis line X. The road.
  • the communication flow path portion 46c allows the refrigerant to flow on the inner peripheral side (closer to the axis X) of the stator 41 than the inflow flow path portion 46a and the outflow flow path portion 46b.
  • the refrigerant flow path 46 formed inside the stator 41 has an inflow in which the distance of the radial RD from the axis X gradually becomes shorter from the inflow port 46d to the outflow port 46e. It has a flow path portion 46a and an outflow flow path portion 46b in which the distance of the radial RD from the axis X gradually shortens from the outflow port 46e to the inflow port 46d.
  • the refrigerant flowing in from the inflow port 46d is guided from the outer peripheral side to the inner peripheral side of the radial RD by the inflow flow path portion 46a.
  • the cooling efficiency of the heating region on the inner peripheral side of the stator 41 can be improved as compared with the case where the refrigerant is circulated on the outer peripheral side of the radial RD. Further, the refrigerant guided to the inner peripheral side of the radial RD can be guided from the inner peripheral side to the outer peripheral side of the radial RD by the outflow flow path portion 46b. Therefore, it is possible to provide the electric compressor 100E capable of sufficiently cooling the stator 41 with the refrigerant to improve the motor efficiency.
  • the refrigerant flow path 46 included in the electric compressor 100E described above is a flow path that extends linearly along the axis X, and circulates at the same position of the circumferential CD around the axis X. It may be the aspect of.
  • the refrigerant flow path 46 may have a swirling flow path portion 46f that swivels in the circumferential direction CD, as in the electric compressor 100F of the first modification of the present embodiment.
  • FIG. 12 is a partial cross-sectional view showing the electric compressor 100F according to the first modification of the present embodiment.
  • FIG. 13 is a cross-sectional view taken along the line JJ of the stator 41 shown in FIG.
  • FIG. 14 is a cross-sectional view taken along the line KK of the stator 41 shown in FIG.
  • FIG. 12 is a cross-sectional view taken along the line LL of FIG.
  • the refrigerant flow path 46 formed inside the stator 41 of the electric compressor 100F of the first modification is located on one end side (bottom 12 side of the housing 10) along the axis X. This is a flow path for flowing the refrigerant from the inflow port 46d provided to the outflow port 46e provided on the other end side (opening 11 side of the housing 10) along the axis X.
  • the refrigerant flow path 46 includes an inflow flow path portion (first flow path portion) 46a, an outflow flow path portion (second flow path portion) 46b, and a swirl flow path portion (first). 3 flow path portion) 46f and.
  • the inflow flow path portion 46a is formed on the inflow port 46d side along the axis X with respect to the outflow flow path portion 46b, and the distance of the radial RD from the axis X is gradually shortened from the inflow port 46d toward the outflow port 46e. It is a flow path.
  • the outflow flow path portion 46b is formed on the outflow port 46e side along the axis X with respect to the inflow flow path portion 46a, and the distance of the radial RD from the axis X is gradually shortened from the outflow port 46e to the inflow port 46d. It is a flow path.
  • the swirling flow path portion 46f is a flow path that is connected to the inflow port 46d, swirls in the circumferential direction CD around the axis X from the inflow port 46d side toward the outflow port 46e side, and communicates with the inflow flow path portion 46a. .. As shown in FIG. 14, the swirling flow path portion 46f has a constant radial RD distance from the axis X at each position along the axis X.
  • the inflow port 46d is arranged at a position different from the position where the inflow flow path portion 46a and the outflow flow path portion 46b are arranged in the circumferential direction CD around the axis X.
  • the refrigerant flowing in from the inflow port 46d can be guided to the inflow flow path portion 46a and can be guided to the outflow port 46e via the outflow flow path portion 46b.
  • the coldest refrigerant is taken in from the inflow port 46d and guided to the refrigerant flow path formed in the teeth portion 41a. be able to.
  • the refrigerant flow path 46 included in the electric compressor 100F of the first modification described above has a swirling flow path portion 46f that swirls only in one direction of the circumferential direction CD, but may be in another embodiment. good.
  • it may have a branch flow path portion 46g that branches so as to swivel only in two directions of the circumferential direction CD, such as the refrigerant flow path 46 provided in the electric compressor 100G of the second modification.
  • FIG. 15 is a partial cross-sectional view showing the electric compressor 100G according to the second modification of the present embodiment.
  • FIG. 16 is a cross-sectional view taken along the line MM of the stator 41 shown in FIG.
  • FIG. 17 is a cross-sectional view taken along the line NN of the stator 41 shown in FIG.
  • FIG. 15 is a cross-sectional view taken along the line OO of FIG.
  • the refrigerant flow path 46 formed inside the stator 41 of the electric compressor 100G of the second modification is located on one end side (bottom 12 side of the housing 10) along the axis X. This is a flow path for flowing the refrigerant from the inflow port 46d provided to the outflow port 46e provided on the other end side (opening 11 side of the housing 10) along the axis X.
  • the refrigerant flow path 46 shown in FIG. 16 branches the refrigerant flowing in from one inlet 46d to two outlets 46e and flows out.
  • the refrigerant flow path 46 includes an inflow flow path portion (first flow path portion) 46a, an outflow flow path portion (second flow path portion) 46b, and a branch flow path portion (first). 3 flow path portion) 46 g and.
  • the inflow flow path portion 46a is formed on the inflow port 46d side along the axis X with respect to the outflow flow path portion 46b, and the distance of the radial RD from the axis X is gradually shortened from the inflow port 46d toward the outflow port 46e. It is a flow path.
  • the outflow flow path portion 46b is formed on the outflow port 46e side along the axis X with respect to the inflow flow path portion 46a, and the distance of the radial RD from the axis X is gradually shortened from the outflow port 46e to the inflow port 46d. It is a flow path.
  • the branch flow path portion 46g is connected to the inflow port 46d and swirls in a circumferential direction CD around the axis X from the inflow port 46d side toward the outflow port 46e side, and communicates with the two inflow flow path portions 46a. Is. As shown in FIG. 17, the branch flow path portion 46g has a constant radial RD distance from the axis X at each position along the axis X.
  • the branch flow path portion 46g branches the refrigerant flowing in from the inflow port 46d into the first branch flow path 46g1 on one side of the circumferential CD and the second branch flow path 46g2 on the other side of the circumferential CD.
  • the refrigerant flowing in from the inflow port 46d is branched into the first branch flow path 46g1 and the second branch flow path 46g2 even when there are few places where the inflow port 46d is provided. , Different regions of the circumferential CD of the stator 41 can be appropriately cooled.
  • the cross-sectional shape of the refrigerant flow path 46 orthogonal to the axis X is circular, but other embodiments may be used. good.
  • the cross-sectional shape orthogonal to the axis X of the refrigerant flow path 46 may be another shape such as a rectangle other than a circle.
  • FIG. 18 is a partial cross-sectional view showing the electric compressor 100H according to the third modification of the fourth embodiment.
  • the cross-sectional shape orthogonal to the axis X of the refrigerant flow path 46 formed in the stator 41 of the electric compressor 100H according to the third modification is on the inner peripheral side rather than the outer peripheral side in the radial direction.
  • the cross-sectional shape orthogonal to the axis X of the refrigerant flow path 46 may be a shape other than the triangular shape.
  • a shape may be adopted in which the outer peripheral side is rectangular and the inner peripheral side is semicircular.
  • the inner peripheral side has a narrower flow path width in the circumferential direction than the outer peripheral side in the radial direction.
  • the electric compressor described in the present embodiment described above is grasped as follows, for example.
  • the electric compressor (100) includes a housing (10) formed in a tubular shape extending along an axis (X), and a housing (10) arranged inside the housing and rotating around the axis to rotate a fluid.
  • the motor includes a compressor (30) for compressing, a motor (40) for rotationally driving the compressor around the axis, and a plurality of fastening bolts (50) for fixing the motor inside the housing.
  • a stator (41) arranged inside the housing and having a first length (L1) along the axis, and a rotor (42) arranged on the inner peripheral side of the stator.
  • the stator is arranged along the circumferential direction (CD) around the axis and has a plurality of positioning portions (41b) having a second length (L2) shorter than the first length along the axis.
  • a fastening hole (51) to which the fastening bolt is fastened is formed in the housing or another member (80) fixed to the housing, and the stator is an insertion formed in the positioning portion. The fastening bolt inserted into the hole (41b1) is fastened to the fastening hole to be fixed inside the housing.
  • the stator is a fastening hole formed in a housing or another member fixed to the housing by inserting a fastening bolt into an insertion hole formed in a plurality of positioning portions of the stator. Is concluded in.
  • the second length of the positioning portion of the stator along the axis is shorter than the first length which is the total length of the stator. Therefore, the contact position where the positioning portion comes into contact with the housing or other member is a position closer to the position of the center of gravity of the motor than the position of the end face along the axis of the stator.
  • the motor is caused by vibration caused by the operation of the electric compressor and external force acting on the electric compressor.
  • the moment acting on the motor becomes smaller. Therefore, it is possible to provide an electric compressor capable of suppressing the generation of vibration and the loosening and breakage of the fastening bolt that fastens the stator to the housing.
  • a plurality of protrusions protruding from the inner peripheral surface of the housing are accommodated in a plurality of grooves formed on the outer peripheral surface of the stator, and a fastening bolt inserted into the positioning portion of the stator protrudes. It is fastened to a fastening hole formed in the end face of the portion. Since the positioning portion does not protrude from the outer peripheral surface of the stator, it is possible to suppress the generation of vibration and the loosening or breakage of the fastening bolt that fastens the stator to the housing without increasing the outer diameter of the electric compressor. Further, since the protruding portion of the housing is housed in the groove portion of the stator, it is possible to appropriately restrict the rotation of the motor in the circumferential direction with respect to the housing.
  • the positioning portion protrudes from the outer peripheral surface of the stator, and the inner peripheral surface of the housing has a first inner diameter (ID1) larger than the outer diameter of the positioning portion.
  • a step portion (14) connecting the first region (R1) and the second region (R2) having a second inner diameter (ID2) smaller than the outer diameter of the positioning portion is formed, and the fastening hole is formed.
  • the configuration may be formed on the end face of the step portion facing the positioning portion.
  • the positioning portion protrudes from the outer peripheral surface of the stator, and the fastening bolt inserted into the positioning portion of the stator is fastened to the fastening hole formed in the end surface of the step portion of the housing. Since the positioning portion has a shape protruding from the outer peripheral surface of the stator, it is possible to suppress the generation of vibration and the loosening or breakage of the fastening bolt that fastens the stator to the housing without weakening the magnetic force of the stator.
  • the housing has an opening (11) sealed by a sealing member (20) at an end on the compressor side along the axis (X).
  • the positioning portion may be configured to be provided at the end of the stator close to the compressor in the direction along the axis.
  • the positioning portion is provided at the end of the stator close to the compressor in the direction along the axis. Therefore, the distance along the axis from the opening of the housing to the position where the fastening hole is formed can be shortened as compared with the case where the stator is positioned on the housing at the end of the stator separated from the compressor. Therefore, workability is improved when a tool is inserted through the opening of the housing to form a fastening hole in the housing.
  • the end face of the positioning portion fixed to the housing may be arranged in the vicinity of the position of the center of gravity of the motor in the direction along the axis.
  • the end face of the positioning portion is fixed to the housing or other member in the vicinity of the position of the center of gravity of the motor. Therefore, it is possible to reduce the moment acting on the motor due to the vibration caused by the operation of the electric compressor and the external force acting on the electric compressor.
  • the motor has a drive shaft (43) connected to the rotor and arranged on the axis, and bearings (60, 70) that rotatably support the drive shaft. ), And the other member is a holding portion (80) that is fixed to the housing and holds the bearing, and the fastening hole is formed on an end surface of the holding portion facing the positioning portion. It may be configured as such.
  • the bearing that supports the drive shaft connected to the rotor is held by the holding portion, and a fastening hole is formed on the end face facing the positioning portion of the holding portion.
  • a fastening hole can be formed in advance in the holding portion before being fixed to the housing. Therefore, the workability when forming the fastening hole is improved as compared with the case where the tool is inserted into the housing to form the fastening hole.
  • the electric compressor according to the present disclosure includes a housing formed in a tubular shape extending along an axis, a compressor arranged inside the housing and rotating around the axis to compress the refrigerant, and the compressor.
  • the motor comprises a motor that is rotationally driven around the axis, and the motor includes a stator that is arranged inside the housing and a rotor that is arranged on the inner peripheral side of the stator, and is inside the stator. Is formed with a refrigerant flow path for flowing a refrigerant from an inlet (46d) provided on one end side along the axis to an outlet (46e) provided on the other end side along the axis.
  • the first flow path portion (46a) is formed on the one end side along the axis and the radial distance from the axis is gradually shortened from the one end side to the other end side.
  • the first is formed on the other end side along the axis line and communicates with the first flow path portion, and the radial distance from the axis line gradually shortens from the other end side toward the one end side. It has two flow paths (46b).
  • the refrigerant flow path formed inside the stator includes a first flow path portion in which the radial distance from the axis gradually shortens from one end side to the other end side. It has a second flow path portion in which the radial distance from the axis is gradually shortened from the other end side to the one end side.
  • the refrigerant flowing in from the inflow port is guided from the outer peripheral side to the inner peripheral side in the radial direction by the first flow path portion. Therefore, the cooling efficiency of the heating region on the inner peripheral side of the stator can be improved as compared with the case where the refrigerant is circulated on the outer peripheral side in the radial direction.
  • the refrigerant guided to the inner peripheral side in the radial direction can be guided from the inner peripheral side in the radial direction to the outer peripheral side by the second flow path portion. Therefore, it is possible to provide an electric compressor capable of sufficiently cooling the stator with the refrigerant to improve the motor efficiency.
  • the refrigerant flow path is connected to the inflow port and swivels in the circumferential direction around the axis from the one end side to the other end side, and the first flow path portion. It may be configured to have a third flow path (46f, 46g) communicating with the third flow path (46f, 46g).
  • the inflow port is arranged.
  • the refrigerant flowing in from can be guided to the first flow path portion and to the outlet through the second flow path portion. For example, when the coldest refrigerant flows between the teeth of the stator, the coldest refrigerant can be taken in from the inlet and guided to the refrigerant flow path formed in the teeth.
  • the third flow path is a first branch flow path (46 g1) on one side in the circumferential direction and a second branch flow path (46 g2) on the other side for the refrigerant flowing in from the inflow port. ) May be used.
  • the electric compressor of this configuration even if there are few places where the inflow port is provided, the refrigerant flowing from the inflow port is branched into the first branch flow path and the second branch flow path in the circumferential direction of the stator. Different areas can be cooled appropriately.
  • the inflow port may be provided in the vicinity of the outer peripheral surface of the stator. According to the electric compressor of this configuration, since the inflow port is provided in the vicinity of the outer peripheral surface of the stator, the refrigerant can be sufficiently taken into the inlet from the vicinity of the outer peripheral surface of the stator in which the amount of refrigerant flowing is large, and the stator can be used. The area on the inner peripheral side can be reliably cooled.
  • the cross-sectional shape of the refrigerant flow path orthogonal to the axis is such that the inner peripheral side has a narrower flow path width in the circumferential direction than the outer peripheral side in the radial direction. It may be configured to be present. According to the electric compressor of this configuration, the flow path width on the inner peripheral side is narrower than the flow path width on the outer peripheral side of the refrigerant flow path. The decrease can be suppressed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

L'invention concerne un compresseur électrique 100 comprenant un logement (10), un compresseur (30), un moteur (40) et une pluralité de boulons de fixation (50) qui fixent le moteur (40) à l'intérieur du logement (10), le moteur (40) comprenant un stator 41 qui est disposé à l'intérieur du logement (10) et qui présente une première longueur L1 le long d'une ligne d'axe X et un rotor 42 disposé sur le côté périphérique interne du stator 41 ; le stator 41 comprenant une pluralité de parties de positionnement 41b qui sont disposées de manière circonférentielle autour de la ligne d'axe X et qui présentent une seconde longueur L2 plus courte que la première longueur L1 le long de la ligne d'axe X ; le logement 10 comprenant des trous de fixation 51 formés en son sein par le biais desquels les boulons de fixation 50 doivent être fixés ; et le stator 41 étant fixé à l'intérieur du logement 10 par insertion des boulons de fixation 50 dans des trous d'insertion 41b1 formés dans les parties de positionnement 41b et par fixation des boulons de fixation 50 dans les trous de fixation 51.
PCT/JP2021/036626 2020-10-05 2021-10-04 Compresseur électrique WO2022075261A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020-168468 2020-10-05
JP2020168468A JP2022060787A (ja) 2020-10-05 2020-10-05 電動圧縮機

Publications (1)

Publication Number Publication Date
WO2022075261A1 true WO2022075261A1 (fr) 2022-04-14

Family

ID=81125108

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/036626 WO2022075261A1 (fr) 2020-10-05 2021-10-04 Compresseur électrique

Country Status (2)

Country Link
JP (1) JP2022060787A (fr)
WO (1) WO2022075261A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024061302A (ja) * 2022-10-21 2024-05-07 株式会社デンソー 電動圧縮機

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4714603B1 (fr) * 1971-01-04 1972-08-11
JPS6219049U (fr) * 1985-07-17 1987-02-04
JP2006274972A (ja) * 2005-03-30 2006-10-12 Sanden Corp スクロール型流体機械
JP2007270696A (ja) * 2006-03-31 2007-10-18 Hitachi Ltd 容積形圧縮機
JP2008312292A (ja) * 2007-06-12 2008-12-25 Komatsu Ltd モータ
WO2011052741A1 (fr) * 2009-11-02 2011-05-05 パナソニック電工株式会社 Pompe et dispositif d'entraînement de pompe
JP2016534697A (ja) * 2013-08-13 2016-11-04 グリー エレクトリック アプライアンシーズ インク オブ ズーハイＧｒｅｅ Ｅｌｅｃｔｒｉｃ Ａｐｐｌｉａｎｃｅｓ， Ｉｎｃ． Ｏｆ Ｚｈｕｈａｉ 永久磁石モーター、冷凍圧縮機および空気調和装置
KR20200090003A (ko) * 2019-01-18 2020-07-28 엘지전자 주식회사 전동식 압축기

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4714603B1 (fr) * 1971-01-04 1972-08-11
JPS6219049U (fr) * 1985-07-17 1987-02-04
JP2006274972A (ja) * 2005-03-30 2006-10-12 Sanden Corp スクロール型流体機械
JP2007270696A (ja) * 2006-03-31 2007-10-18 Hitachi Ltd 容積形圧縮機
JP2008312292A (ja) * 2007-06-12 2008-12-25 Komatsu Ltd モータ
WO2011052741A1 (fr) * 2009-11-02 2011-05-05 パナソニック電工株式会社 Pompe et dispositif d'entraînement de pompe
JP2016534697A (ja) * 2013-08-13 2016-11-04 グリー エレクトリック アプライアンシーズ インク オブ ズーハイＧｒｅｅ Ｅｌｅｃｔｒｉｃ Ａｐｐｌｉａｎｃｅｓ， Ｉｎｃ． Ｏｆ Ｚｈｕｈａｉ 永久磁石モーター、冷凍圧縮機および空気調和装置
KR20200090003A (ko) * 2019-01-18 2020-07-28 엘지전자 주식회사 전동식 압축기

Also Published As

Publication number Publication date
JP2022060787A (ja) 2022-04-15

Similar Documents

Publication Publication Date Title
US6836051B2 (en) Motor
KR101592069B1 (ko) 전동 압축기
WO2017141877A1 (fr) Dispositif électrique et compresseur d'alimentation électrique
US9234527B2 (en) Motor driven compressor
WO2013172189A1 (fr) Compresseur électrique
JP2009150234A (ja) 電動圧縮機
WO2022075261A1 (fr) Compresseur électrique
JP2019190457A (ja) 流体コンプレッサー
JP2019190458A (ja) 流体コンプレッサーを備えるヒートポンプ
JP6304340B2 (ja) 電動圧縮機
JP6654414B2 (ja) 電動圧縮機
JP2008082279A (ja) 電動コンプレッサ
JP2019190461A (ja) 流体コンプレッサーを備える燃料電池
JP2008141892A (ja) 自己始動形永久磁石式同期電動機およびそれを用いた圧縮機
JP6793178B2 (ja) 回転電気のロータ
KR100902118B1 (ko) 초고속 전동기
JP6103904B2 (ja) 電動圧縮機
US20240167481A1 (en) Multistage fluid compressor
JP7396226B2 (ja) 回転電機
WO2023136117A1 (fr) Machine électrique rotative
KR100320208B1 (ko) 터보 압축기의 모터 냉각구조
KR102373383B1 (ko) 스테이터 코어
WO2022153530A1 (fr) Machine électrique rotative et procédé de fabrication de machine électrique rotative
JP7452711B2 (ja) 電動過給機
US20230358234A1 (en) Scroll compressor

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21877560

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21877560

Country of ref document: EP

Kind code of ref document: A1